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2. List of mobile network operators in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   AT&T, T-Mobile, Verizon, Boost Mobile, and UScellular also sell SIM cards through their retail channels, both in-store and online. The top five wireless providers operate nationwide wireless networks which cover most of the population in the United States, while smaller carriers provide native network coverage across selected regions of the ...

3. The Best Cell Phone Providers: What’s Worth the Cost? - AOL

   www.aol.com/finance/best-cell-phone-providers...

   T-Mobile 3GB Breakdown. Also coming in at $15 per month is T-Mobile’s 3GB plan. This is part of the new Connect by T-Mobile plans. While this T-Mobile connect plan is affordable, once you use up ...

4. Category : Defunct mobile phone companies of the United States

   en.wikipedia.org/wiki/Category:Defunct_mobile...

   A. Advanced Mobile Phone Service. AirTouch. Amp'd Mobile. AT&T Wireless Services.

5. List of mobile network operators - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   Comparison of mobile phone standards; List of sovereign states by number of broadband Internet subscriptions; List of countries by number of Internet users; List of countries by number of telephone lines in use; List of countries by smartphone penetration; List of multiple-system operators; List of telephone operating companies

6. List of mobile network operators in Canada - Wikipedia

   en.wikipedia.org/wiki/List_of_mobile_network...

   The remaining 10% of subscribers are served by smaller, regional providers, mobile virtual network operators (MVNOs), and resellers. [2] Regional providers own and operate transmission facilities that cover a limited area and rely on partnerships with national service providers to connect their customers across Canada.

7. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM . Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.